ADR-0087 exemption (no-migration-prescription): no metadata body, authorable key, spelling, export or stored shape moves; what changes is which tables a sandboxed hook or action body may be bound to and may write, so `objectstack migrate meta` has nothing to rewrite. The other categories are closed on facts: the package publishes (not `unpublished`); no ADR-0087 id covers a refused binding or a refused write (not `registered` / `already-registered`); and the change is runtime behaviour, not a declaration (not `runtime-interface-only` / `type-surface-only`).